Mermaid
89 · HealthyGenerates flowcharts, sequence diagrams, Gantt charts and more from text definitions.
Open source alternatives to Lucidchart
3 open source projects replace Lucidchart, ranked by how safe each is to depend on.
draw.io
67 · StableDiagram editor for flowcharts, network diagrams, org charts and UML, in the browser or on the desktop.
Excalidraw
65 · StableVirtual whiteboard for hand-drawn style diagrams and sketches, with real-time collaboration.
Mermaid
89 · Healthy
Excalidraw
65 · StableAt a glance
Health and license are separate verdicts: a project can be well maintained and still not be open source.
| Project | Health | License | Stars |
|---|---|---|---|
| Mermaid | 89 · Healthy | Free to useMIT | 91k |
| draw.io | 67 · Stable | Free to useApache-2.0 | 8.6k |
| Excalidraw | 65 · Stable | Free to useMIT | 134k |
More in Design & image editing
Lucidchart is a paid design & image editing product. See all open source design & image editing tools, ranked the same way.
Scores last refreshed from GitHub on 9 October 2026. How we score.